---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-061082"
form_type: "8-K"
ticker: "SBXD"
cik: "0002015947"
company_name: "SilverBox Corp IV"
filed_at: "2025-06-20T23:59:59+00:00"
generated_at: "2026-05-19T02:06:27.632743+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Parataxis definitively acquires control of Bridge Bio for KRW 25B to create Bitcoin treasury company

## Summary
- Parataxis Holdings to invest KRW 25 billion for controlling interest in Bridge Biotherapeutics (KOSDAQ: 288330).
- Post-closing, company renamed 'Parataxis Korea' and remains KOSDAQ-listed; will build Bitcoin treasury on Strategy/Metaplanet model.
- Edward Chin to join board; Andrew Kim to become CEO of renamed company; James Lee to lead biotech division.
- Transaction subject to shareholder approval; meeting expected in August 2025.
- Parataxis also closing another fund with same strategy and launching additional vehicles.

## SEC filing metadata
- accession: 0001104659-25-061082
- form_type: 8-K
- ticker: SBXD
- cik: 0002015947
- company_name: SilverBox Corp IV
- filed_at: 2025-06-20T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2015947/000110465925061082/0001104659-25-061082-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2015947/000110465925061082/tm2518539d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-061082
- JSON: https://secwatch.observer/filing/0001104659-25-061082.json
- Plain text: https://secwatch.observer/filing/0001104659-25-061082.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.